2.2 Dodge Turbo Engine ??

[JodyB]

Still have my old glh omni started playing with in 96. Ate alot of pistons way back when the only info in magazines was from buick gn and svo's. Way back when being a turbo guy meant it was gonna eat some parts, and you didn't blame anyone.

[JodyB]

Eventually ran 7.34@100 in the eighth in the omni with very basic parts. Biggest ahaaaah!! moment was sectioning a swirl head to find over 1/2 inch of aluminum hotspot in the tit of the heart shaped chamber, causing detonation.

[JodyB]

Made an open chambered head out of the swirl casting, similar to an old small block mopar, with consistent thickness, and "availability" of coolant to the chamber. Also drilled water passages oversize in block, head gasket, and head below exhaust ports.

[JodyB]

In the end, the engine was very forgiving of the tuneup. Where previously the engines would bust the ringland between the 1st and 2nd ring before you could ever hear knock, the open chambered headwould eat the center of the piston with no other ill effects given the wrong tuneup and sparkknock.

[JodyB]

Grab your sawsall or bandsaw, cut a swirl 2.2 head in half at the tit and have a look. It's over a 1/2 inch aluminum with no possibility of coolant flow behind it, that becomes a glowplug under sustained high combustion temperatures

[In-Tech]

Grab your sawsall or bandsaw, cut a swirl 2.2 head in half at the tit and have a look. It's over a 1/2 inch aluminum with no possibility of coolant flow behind it, that becomes a glowplug under sustained high combustion temperatures

I'm with ya, same goes for L29 454 cu in BBC iron heads as well as the 8.1L supposed BBC LS copy. Preignition just waiting for a chance. Yuck

[JodyB]

Also, went 7.7@91 in the eighth with a maxed out stock early turbo1 combo in the omni. Key was a huge throttle body and elbow before turbo.

[JodyB]

Stock early turbo1 plumbing and throttle body limited high rpm boost to 16psi in testing. Vacume gauge between stock throttlebody and compressor inlet pegged when mid rpm boost acheved 21psi, and final boost was 16psi. Fabbed new 3 inch inlet and throttle body, reduced in size at turbo inlet.

[JodyB]

Acheived 230ish dynojet whp with a very basic eary t1 combo, with a big throttle body and inlet tube, no exhaust at 21 psi. Later added supplemental 100% methanol injection for much greater run to run repatability.

[JodyB]

In truth, the 7.7 eighth mile t1 runs saw a 30psi gauge pegged until a 5500 shift where boost dropped to 27-28psi. On 110racegas of course.

[JodyB]

In truth, i never played with the g-casting bathtub chambered head. Things kindof stalled on my glh junk motor development at 7.3@100 in the 1/8th when the owner of the dyno shop i worked for had a tantrum about killing the hondas he was trying to bring in for hotrod honda engine building and tuning.

[JodyB]

That last motor was a stock 1985 bottom end turbo1 motor. Ported swirl head with stock valves.

[JodyB]

Woops, 1986 shortblock/ bottom end

[JodyB]

Big deals. Stock hydraulic lash adjusters(lifters) bleed down. Put spacers under them till they're damn near solid. Put some real valvesprings on it. The super 60 cam works well with low differential pressure. Ex to intake.

[JodyB]

In-tech, thanks for the bbc insight. Failure analysis in my testing led to a great big why didn't i see that before moment.